Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 28-08-2021 and time 00:07:13 (UTC) in region 1 km E Micigliano (RI)

A magnitude ML 1.2 earthquake occured in region: 1 km E Micigliano (RI), on

  • 28-08-2021 00:07:13 (UTC)
  • 28-08-2021 02:07:13 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.4480, 13.0650 at 11 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

Search earthquakes: Any within 30 km radius

The values of hypocentral coordinates and magnitude may be revised at a later time as more information becomes available.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Micigliano RI 1 127 127
Antrodoco RI 4 2588 2715
Borgo Velino RI 5 972 3687
Castel Sant'Angelo RI 7 1308 4995
Posta RI 9 694 5689
Borbona RI 9 617 6306
Cittaducale RI 12 6828 13134
Cagnano Amiterno AQ 13 1369 14503
Cantalice RI 13 2755 17258
Leonessa RI 15 2435 19693
Concerviano RI 15 291 19984
Poggio Bustone RI 16 2055 22039
Petrella Salto RI 17 1197 23236
Montereale AQ 17 2581 25817
Rieti RI 17 47698 73515
Barete AQ 18 737 74252
Scoppito AQ 18 3727 77979
Rivodutri RI 19 1253 79232
Pizzoli AQ 19 4326 83558

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km W of L'Aquila (69753 inhabitants)
37 Km E of Terni (111501 inhabitants)
57 Km NE of Guidonia Montecelio (88673 inhabitants)
58 Km W of Teramo (54892 inhabitants)
58 Km NE of Tivoli (56533 inhabitants)
64 Km SE of Foligno (57155 inhabitants)
78 Km NE of Roma (2864731 inhabitants)
79 Km E of Viterbo (67173 inhabitants)
88 Km N of Velletri (53303 inhabitants)
89 Km W of Montesilvano (53738 inhabitants)
91 Km W of Chieti (51815 inhabitants)
92 Km SE of Perugia (166134 inhabitants)
94 Km W of Pescara (121014 inhabitants)
98 Km NE of Pomezia (62966 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100 		ML 1.2 2021-08-28
00:07:13		 42.4485 13.0653 11 2021-08-28
00:15:27		 Sala Sismica INGV-Roma 94725371
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-28 00:07:13 ± 0.15
Latitude 42.4485 ± 0.0081
Longitude 13.0653 ± 0.0085
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 94725371

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 904
Semi-minor axis of confidence ellipse (meter) 659
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 160
Circular confidence region, given by single value of horizontal uncertainty (meter) 900.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 133
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.49013
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.1
Num. used stations 6
Type of magnitude ML
Reference to an origin 94725371
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-08-28 00:15:27
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.LPEL.HHZ. 2021-08-28T00:07:32.50 3.0 undecidable manual P 0.15 0
IV.MMO1.EHZ. 2021-08-28T00:07:31.06 0.6 undecidable manual S 23 54.4011 50 0.52 43
IV.NRCA.HHZ. 2021-08-28T00:07:27.36 0.6 undecidable manual S 5 42.9237 50 -0.12 48
IV.ARRO.EHZ. 2021-08-28T00:07:23.50 0.6 undecidable manual S 301 28.4493 50 -0.13 49
IV.SMA1.EHZ. 2021-08-28T00:07:23.93 0.6 undecidable manual S 47 29.9478 50 -0.08 50
IV.MMO1.EHZ. 2021-08-28T00:07:23.38 0.6 undecidable manual P 23 54.4011 50 0.04 48
IV.TERO.HHZ. 2021-08-28T00:07:22.13 0.1 undecidable manual P 66 48.1185 50 -0.24 93
IV.NRCA.HHZ. 2021-08-28T00:07:21.44 0.3 negative manual P 5 42.9237 50 -0.13 72
IV.RM33.EHZ. 2021-08-28T00:07:19.45 0.6 undecidable manual S 61 13.875 128 -0.14 51
IV.ARRO.EHZ. 2021-08-28T00:07:19.55 1.0 negative manual P 301 28.4493 50 0.2 24
IV.SMA1.EHZ. 2021-08-28T00:07:19.63 0.1 positive manual P 47 29.9478 50 0.06 100
IV.FIAM.HHZ. 2021-08-28T00:07:18.37 1.0 undecidable manual P 168 20.4684 50 0.26 24
IV.RM33.EHZ. 2021-08-28T00:07:17.18 0.3 positive manual P 61 13.875 128 0.16 76
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RM33.EHE. ML:1.4 0.00027150000000000004 0.44 AML other m 2021-08-28T00:07:20.23
IV.RM33.EHN. ML:1.1 0.0001315 0.48 AML other m 2021-08-28T00:07:20.45
IV.SMA1.EHN. ML:1.1 0.00005725 0.58 AML other m 2021-08-28T00:07:24.31
IV.SMA1.EHE. ML:1.3 0.000089 1.12 AML other m 2021-08-28T00:07:24.37
IV.NRCA.HHE. ML:1.2 0.0000564 0.12 AML other m 2021-08-28T00:07:27.48
IV.NRCA.HHN. ML:1.2 0.0000498 0.94 AML other m 2021-08-28T00:07:27.10
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download